MR. O'ROURKE: The suggestion of soaking them in water a few days is well taken, because a great many have recommended it. Most folks recommend changing the water daily. By changing the water you replace the oxygen which would be in the water, and you also eliminate any toxic substances which may have leached out of the shells during the preceding 24 hours. DR. MCKAY: I'd like to mention the reason for raising this question. Dr. Crane has the idea that there is no definite rest period in the pecan nut; if they are soaked in water they will sprout at any time. I decided I would test that hypothesis, so I stratified one group of nuts of about four pounds. Another lot of four pounds I kept in the laboratory dry all winter long. Then I planted the two lots of nuts this spring together, side by side, in the cold frame. Today there is not a single seedling growing out of the dry lot, and there is a perfect stand in the group that was stratified. To me that means that there is a definite rest period in the pecan seed. I don't see how you can get away from it. MR. O'ROURKE: I am going to stick my neck out a little bit. I have absolutely no basis to make this statement, but it does give us something to think about. That is the greater the distance towards the north that certain species of plants may have migrated or disseminated, the greater the rest period requirement. That is a protective device for a species to persist in northern climates, because if it were not for this rest period, those seed would germinate in the fall of the year, and the young seedlings would be frozen out immediately. But by having the rest period requirement over winter, the seedlings do not germinate until the following spring, and the plant can persist. I am speaking now in general of northern plants. I am wondering if the pecan species in itself may not be variable in that the southern pecan does not need a rest period, and the northern pecan is beginning to develop the rest period requirement. MR. HARDY: Mr. Chairman, I am inclined to think there may be some other factor entering into the picture there. A pecan carried through winter in a dry condition at normal room temperatures would be liable to develop quite a bit of rancidity by spring. Furthermore, nuts that have been held over so long in a dry condition may still be good and may germinate the second year. I'd hesitate to destroy that planting until next spring, and to my notion that does not indicate dormancy so much as it would possibly indicate the inhibition of growth by some other products developed during that storage period.